gaupol: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/gaupol - from package: gaupol

You may install the required package with command apt-get install {package}

Error in other languages:
gaupol: bevel nie gevind nie
gaupol: comandă negăsită
gaupol: comando não encontrado
gaupol: commande introuvable
gaupol: command not found
gaupol: käsku ei ole
gaupol: không tìm thấy lệnh
gaupol: komanda nerasta
gaupol: Kommando nicht gefunden.
gaupol: kommandot finns inte
gaupol: komut yok
gaupol: nie znaleziono polecenia
gaupol: níor aimsíodh an t-ordú
gaupol: no se encontró la orden
gaupol: no s'ha trobat l'ordre
gaupol: opdracht niet gevonden
gaupol: parancs nem található
gaupol: perintah tidak ditemukan
gaupol: príkaz nenájdený
gaupol: příkaz nenalezen
gaupol: команда не найдена
gaupol: командата не е открита
gaupol: 命令找不到
gaupol: コマンドが見つかりません